On Thu, 4 Oct 2007 11:06:38 +0100 Stuart Prescott <[EMAIL PROTECTED]> wrote:
[snip] > I never did discover exactly what was going on here, but here are some things > that might help you that I did find in the course of investigating this > problem and a number of other laptop power supply-related problems we have > been having with instrumentation in our labs. > > * the power supply in question was a non-genuine one. [0] > > * laptop power supplies are pretty ugly in the electronic sense. They produce > amazing amounts of electrical noise in the 50-100kHz range that ends up > coming out in all sorts of places where it shouldn't. Non-genuine power > supplies are worse than genuine power supplies at this at this too. [1] By 'non-genuine', do you mean 'not branded by the laptop manufacturer' or a no-name brand? I was considering something like this Belkin unit [0] for my Acer, but your warning is making me nervous! [0] http://www.buy.com/retail/product.asp?sku=204297559&loc=101 > cheers > Stuart > > > [0] it was purchased from ebay... I should have known better... non-genuine > power supplies seem to cause many more problems than the save in cost. > > [1] Looking at 4 genuine power supplies and 5 non-genuine ones that we had > available to us, we found significantly more noise coming from the > non-genuine power supplies to the point where a couple of non-genuine power > supplies for thinkpads just cannot be used any where near our instruments -- > don't even plug them into the same wall socket! > > -- > Stuart Prescott www.nanoNANOnano.net Celejar -- mailmin.sourceforge.net - remote access via secure (OpenPGP) email ssuds.sourceforge.net - A Simple Sudoku Solver and Generator -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
